“We have not received any plan made by (Russia's Foreign Minister Sergei) Lavrov yet but we will review it upon its receipt,” Mehmanparast told reporters at his weekly press conference on Tuesday.

“Iran's peaceful nuclear activities are in line with the regulations of the International Atomic Energy Agency (IAEA) and the Nuclear Non-Proliferation Treaty (NPT). They are completely legal and based on the rights of the Iranian nation,” he went on to say.

The spokesman emphasized that the Islamic Republic informs the IAEA about any nuclear activity it carries out.

If different countries seek to settle (outstanding) issues about the nuclear case, they should adopt an approach which recognizes the rights of the Iranian people, Mehmanparast underlined.

On July 14, Lavrov laid out a new “step-by-step” approach that would enable Iran to take steps to address questions raised by the International Atomic Energy Agency (IAEA) regarding Tehran's nuclear program.

According to the plan, Iran can revive negotiations to alleviate individual concerns of the IAEA about its nuclear activities and be rewarded along the way by partial removal of sanctions.

The approach would start out with the easiest questions and move onto more complicated ones that would require a longer time to respond to, according to the Russian official.

"The response to each specific step of Iran would be followed by some reciprocal steps, like freezing some sanctions and shortening the volume of sanctions," Lavrov further explained.